Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 10.5, Problem 2C
Summary Introduction
To determine: The way by which meiosis and fertilization maintain the normal chromosome number when a sexually reproducing organism like protists is haploid throughout most of its life cycle.
Introduction: In the process of cell division, the chromatin present in the nucleus shrinks and forms a thread like structure called the chromosomes. Cells divide either by mitosis or meiosis processes. A protist is a eukaryotic organism that is distinct from animal, plant or
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In eukaryotic reproduction two haploid gametes fuse together to produce a diploid zygote which will grow into a new living organism with characteristics from both parents.
true or false?
A cell undergoing division has a haploid chromosome number of 15. Give the numerical value for each of the following:
a) number of chromatids in a cell in anaphase of mitosisb) number of chromosomes in a cell in metaphase of mitosisc) number of homologous pairs in a cell in prophase of meiosis I
d) number of chromatids in a cell in metaphase of meiosis IIe) number of centromeres in a cell in prophase of meiosis II
f) number of centromeres following cytokinesis of meiosis I
A cell undergoing division has a haploid chromosome number of 8. Give the numerical
value for each of the following:
number of chromatids in a cell in prophase of mitosis
number of chromosomes in a cell in metaphase of mitosis
number of homologous pairs in a cell in anaphase of meiosis I
number of centromeres in a cell in anaphase of meiosis I
number of chromatids in a cell in metaphase of meiosis II
number of centromeres in a cell in prophase of meiosis II
Chapter 10 Solutions
Biology (MindTap Course List)
Ch. 10.1 - Discuss the significance of chromosomes in terms...Ch. 10.1 - Explain how DNA is packed into chromosomes in...Ch. 10.1 - What are the informational units on chromosomes...Ch. 10.1 - How is the large discrepancy between DNA length...Ch. 10.2 - Identify the stages in the eukaryotic cell cycle...Ch. 10.2 - Describe the structure of a duplicated chromosome,...Ch. 10.2 - Prob. 5LOCh. 10.2 - Prob. 1CCh. 10.2 - What are the stages of mitosis, and what happens...Ch. 10.3 - Prob. 6LO
Ch. 10.3 - What are cell-cycle checkpoints?Ch. 10.3 - Prob. 2CCh. 10.4 - Prob. 7LOCh. 10.4 - Distinguish between haploid and diploid cells, and...Ch. 10.4 - Prob. 9LOCh. 10.4 - 10.2 What are the stages of mitosis, and what...Ch. 10.4 - Prob. 1CCh. 10.4 - Prob. 2CCh. 10.4 - Can haploid cells divide by mitosis? by meiosis?Ch. 10.5 - Prob. 11LOCh. 10.5 - Prob. 1CCh. 10.5 - Prob. 2CCh. 10 - A nucleosome consists of (a) DNA and scaffolding...Ch. 10 - Test Your Understanding 2. At which of the...Ch. 10 - In a cell at __________, each chromosome consists...Ch. 10 - The molecular tether that links sister chromatids...Ch. 10 - In an animal cell at mitotic metaphase, you would...Ch. 10 - A diploid nucleus at early mitotic prophase has...Ch. 10 - You would expect to find a synaptonemal complex in...Ch. 10 - A chiasma links a pair of (a) homologous...Ch. 10 - VISUALIZE Sketch a mitotic prophase chromosome and...Ch. 10 - CONNECT Does the DNA content of the cell change...Ch. 10 - Fill out the following table for a cell with 5...Ch. 10 - Fill out the following table for a diploid cell...Ch. 10 - In questions 13 and 14, decide whether each is an...Ch. 10 - Prob. 14TYUCh. 10 - EVOLUTION link How does mitosis provide evidence...Ch. 10 - Prob. 16TYU
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- In prophase II of meiosis, each daughter cell is _____. A) diploid, and the chromosomes are each composed of a single chromatid B) diploid, and the chromosomes are each composed of two chromatids C) haploid, and the chromosomes are each composed of a single chromatid D) haploid, and the chromosomes are each composed of two chromatidsarrow_forward8) The diagram below represents a yeast cell that is in the process of budding, a form of asexual reproduction. Nucleus -Bud "Nucleus Which of the following statements describes the outcome of this process? A) The two cells that result will each contain half the species number of chromosomes. B) The two cells that result will have identical DNA. C) The bud will develop into a zygote. D) The bud will start to divide by the process of meiotic cell division.arrow_forwardWhy must the life cycle of sexually reproducing species alternate between haploid and diploid stages? A) Mitosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. B) Meiosis must occur at some point in the life cycle to prevent a doubling of chromosomes in each generation. C) Mitosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation. D) Meiosis must occur at some point in the life cycle to prevent a reduction of chromosomes in each generation.arrow_forward
- What is the difference between a haploid and a diploid eukaryotic cell?arrow_forwardHow many copies of the genome does a haploid yeast cell have?arrow_forwardAt the end of mitosis in Aedes aegypti, each of the daughter cells will have chromosomes; however, at the end of meiosis, each daughter cell will end up with chromosomes.arrow_forward
- What is the difference between a chromosomes and a chromatids? a) there is no difference they are the same b) chromatids is always one stand of dna chromosomes can be one or two strand depending on the phase of the cell cycle c) chromatids is always two strands of dna chromosomes can be one or two stands depending on the phase of the cell cycle d) chromosomes are homologous chromatids are identicalarrow_forwardWhy do diploid organisms that reproduce via sexual reproduction even bother with meiosis? What is the point of this complex and energetically expensive process?arrow_forwardA cell in G1 of interphase has 12 chromosomes. How many chromosomes and DNA molecules (chromatids) will be found per cell when this original cell progresses to the following stages? a) G2 of interphaseb) Metaphase I of meiosisc) Prophase of mitosisd) Prophase II of meiosise) After cytokinesis following mitosis f) After cytokinesis following meiosisarrow_forward
- What is the difference between the metaphase chromosome and telophase chromosome? Metaphase chromosomes exist as single chromatids; meanwhile, telophase chromosomes appear as sister chromatids Metaphase chromosomes materialize as homologous chromosome; on one hand, telophase chromosomes are structurally bonded with its homologue. Metaphase chromosomes exist as sister chromatids; meanwhile, telophase chromosomes appear as single chromatids Metaphase chromosomes are structurally bonded with its homologue; on the other hand, telophase chromosomes do not materialize homologous chromosomes.arrow_forwardWhich are the three tetrad types produced by meiosis of dihybrid yeast?arrow_forwardWhen the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. Although ascospores are produced by mitotic division, none of the spores develop into fungi that are identical to either parental hyphae. What is the BEST explanation for this observation? A. The spores inherit half their genes from each parent. B. The spores inherit haploid nuclei from their parents. C. The spores inherit mutations as a result of meiosis. D. The spores inherit mutations as a result of mitosis.arrow_forward
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